ATLANTA (AP) — Authorities say some students are recovering from their injuries after an experiment to make a model volcano erupt led to an explosion in an Atlanta classroom.

Atlanta Prep Academy Principal Dr. Lynette Walker tells WSB-TV (http://bit.ly/UlSFV5) that students had been working on their volcano experiments when one student gave the dry ice for his volcano to a classmate when the substitute teacher wasn't looking. Walker said one of the students took the dry ice and put it in a water bottle with vinegar and it exploded during the experiment last week.

Officials said part of the bottle struck one student's forehead. A second student suffered a burn to his hand. Authorities say the chemicals got into another student's face.